After resurrecting the Ti moniker last year, NVIDIA now also brings back the "MX" with the new GeForce GTX 680MX, GeForce GTX 675MX and GeForce GTX 670MX mobile GPUs. While the GeForce 4 MX is a bad memory from the past, these new chips seem to be quite another breed.
The GeForce GTX 680MX replaces the GTX 680M as NVIDIA's fastest laptop GPU, it offers a 28nm GK104 GPU with 1536 CUDA cores, 720MHz core, 256-bit memory bus and 2GB GDDR5 memory clocked at 5000MHz. The previous model had only 1344 CUDA cores and was paired with 3600MHz memory.
Next is the GeForce GTX 675MX, also based on the GK104, this model has 960 CUDA cores, a 600MHz core, 256-bit memory bus, and 2GB GDDR5 memory clocked at 3600MHz.
Then we also have the GeForce GTX 670M, this chip features the 28nm GK106 GPU with 960 CUDA cores, 600MHz core, 192-bit memory bus and 2GB GDDR5 with a 2800MHz frequency.
Unfortunately, there are no details about power consumption.